Retainer for rust inhibitor



FIG. 1 is a front elevation view of our invention;

FIG. 2 is a rear elevation view of our invention;

FIG. 3 is an elevation view of one side of our invention, the other side being the mirror image thereof;

FIG. 4 is a top elevation view of our invention; and,

FIG. 5 is a bottom elevation view of our invention. 

The ornamental design for a retainer for a rust inhibitor, substantially as shown and described. 